Cushion-wheel.



H. J. SEWELL. cusmom WHEEL.

I APPLICATION FILED AUG-22, 914.

Patented Jan. 4,1916.

I Y EYE "nnmanitrzn. sEwELL, or rircnnnni: PARK, MICHIGAN.

CUSHION-WHEEL.

Specification of Letters Patent Patented J an. 4, 1915.

v arplia'tion filed August 22, 1914. Serial No. 858,011.

' useful Improvement in 'Cushion-VVheels, and

declare the. following to be a full, clear, "and exact description ofthe same, such as will enable others skilled in the art to which itpertains to make and use the same, refer- 'ence being had to theaccompanying drawings', which form a part'of this specification. Thisinvention relates to cushion wheels. It. has for its. object a peculiarform of sheathing for the cushioning device.

In the drawings,'Figure 1, is a side elevation of part of a wheelshowing one form of vmy invention, Fig. l isa side elevation ofia partof a wheel and partly broken away, showing another form of my invention.Fig.

23 5s a vertical cross-section of a wheel hav- ,ing-the triangularshield pieces shown in Fig. 1. Fig. 3, is a perspective view of one ofthe triangular shield pieces. l

a designates the inner wheel part, b the outer wheel part. These; arespaced in normal concentric relation preferably by a zigzag rubberstrip0 which permits the two wheel parts to assume ehcentric relation withrespect to each other, but immediately after the shock is over has atendency to return the parts to relative concentric position. It will,however, be understood that when the z-wheel is in operation, the twowheel parts are never in exactly concentric relation due -to.-'theweight of the load upon the inner wheel part that will, cause the innerwheel part to move closer to the outer wheel part near the bottom. Therubber rings d act not only to "assis t.the zigzag strip in the yieldingresistance between the outer and inner wheel parts but also serve tocompletely exclude mud, watera'nd other foreign substances fromgettingbetween the 'wheel parts and interfering with the. spreading ofthe portions of the .zig-zag rubber strip 0.

The rings (1 may be made of pure rubber orcombination of rubber and someother material. These. rubber rings (i may be protected from abrasion bythe triangular plates 6 ('shown'in Fig. l) which also resist lateraldisplacement ofthe wheel parts and cushionin'g devices and prevent itsdestructive effects. These plates 'e are substantial trithe outer andinner wheel parts.

angles. They are spaced slightly from each other along their two sides,this spacing permitting but also limiting the possible eccentricrelative movement of the two wheel parts. It will be observed that eachtrito the wheel part that carries it, While the -unfa stened part iscomparatively narrow and that they are alternately attached to shieldplate is provided with a lip 7 adapted to fit in a notch of the flexiblering d.

In Fig. 1 I have shown a modified form of shield plates. The shields onthe one I wheel part are staggered with respect -to the shields on theother wheel part and each is provided with a central extension m whichopposes the two meeting ends of the shields on the other wheel part andfits into the concavity formed by them. Thisforms a zig-zag spaceexposing the rubber ring d. It will be readily understood that bychanging the arrangement of the shield pieces by moving each one alongthe distance be tween the bolt holes the exposure on the rubber ring atwill be shifted and hence the wear will be more uniform. This sameshifting is possible with the triangular pieces.

One of the main features of improvement in the two forms of shieldplates shown in the drawings is the arrangement of the plates so thatthe shield plates on one wheel Each part rotrude farther towardv theother Wheel part thereby forming a large surface to prevent the lateraldisplacement of the wheel parts with respect to each other. For instancewith the triangular shield plates, these plates extend from one wheelpart to the other so as to e of almost a positive preventive of lateral.displacement of the might be the case with the cushioning member made upof small sections as has been done in the prior art.

What I claim is:

1. A resilient wheehhaving in combination, an inner wheel part, an outerwheel part, cushioning devices spacing the two wheel parts, shieldplates disposed in substantially the same plane, some being fastened toonly one wheel part and some fastened to onlythe other wheel part, thesaid shield plates fastened to one wheel part extending beyond butspaced from the shield plates fastened to the other wheel part and thesaid shield plates engaging against the cushioning devices and servingto prevent lateral displacement of the two wheel parts, substantially asdescribed.

2. A resilient wheel, having in combination, an inner wheel part, anouter Wheel part, cushioning devices spacing the two wheel parts, aplurality of shield plates disposed in substantially the same plane,each shield plate secured to only one wheel part and the shield platesalternating in being secured to the one wheel part and the other wheelpart, the alternating shield plates extending radially beyond each otherand spaced from each other to allow relative movement of the two wheelparts and engaging against the cushioning devices to prevent lateraldisplacement of the' two wheel parts, substantially as described.

3. A resilient wheel, having in combination, anv inner Wheel part, anouter Wheel meat-pea part, cushioning} devices spacing the two wheelparts, shield plates disposed in substantially the same plane and at theside of the cushioning devices, some being fa s tened to only one wheelpart and some being fastened to only the other Wheel part, the saidshield plates fastened to the one wheel part extending to overlappingrelation with the other wheel part and the shield plates fastened to thelatter wheel part. extending into overlapping relation with the formerWheel part, the individual shield plates fastened to one Wheel part beping spaced from the individual shield plates fastened to the other wheelpart, substantlally as described.

fl. A resilient wheel, having in combinatlon, an inner wheel part, anouter wheel part, cushioning devices spacing the two wheel parts insubstantially the same plane at each side triangular shield plateslocated of tl e cushioning devices and alternately inverted, each shieldplate secured to only one wheel part at its base but overlapping theother wheel part at its apex, the said shield plates being spaced fromeach other to allow relative movement between the heel parts,substantially as described,

In testimony whereof I sign this specification in the presence of twowitnesses.

HERBERT J. SEWELL. Witnesses VIRGINIA C. SPRATT, -AGNES M. Hnemns.

